Patent GB-191415861-A (GB)
Title: Improvements in Registering Devices for Sheet Feeders.
IPC: B65H9/10
Filed: 1914-07-02
Granted: 1915-07-02
Abstract: 15,861. Story, W. B., and Story Co., W. B. July 2. Sheet-registering devices sheet carriers and forwarders. - S h e e tfeeding devices for printing - machines &c. comprise means for side registering the sheets without stopping them, by moving the feedrollers along their axes, a feeler device being provided for stopping the transverse motion when the sheets reach a predetermined lateral position. The devices may be combined with means for registering the ends also of the sheets without stopping them. The sheets are fed from a pile feeder 4, Fig. 1, which is purposely placed to one side of the central position, and the sheets are taken by tapes 11 to feed - rollers 15, 16. The lower feed - rollers 15 are mounted on a shaft 14, which is rotated from the shaft 19 of the impression cylinder by intermediate gearing and is movable endways in bearings 24 being provided with a spring buffer 25. The upper feed-rollers 16 are supported on arms 17 on a shaft 18, which is rocked by means of a cam-operated arm 18<a> and is movable endways in bearings 30. The shafts 18, 14 are connected by a yoke 31. The yoke is provided with a nut 32 sliding in a bearing 33 and engaged by a screw 34 having a pinion 35 which is rotated by means of gearing 36, 38 and a sector 39 which is oscillated by a link 42 from the shaft 19 of the impression cylinder. By these means the rollers derive their endlong motion; the tape rollers 13 do not move with the shaft 14, being splined thereto and maintained in the same position by fixed forks. When the sheets reach the predetermined lateral position, a feeler 66 drops and mechanism is actuated for stopping the endlong movement of the rollers. This mechanism comprises a sleeve screw 47 provided with a pinion 45 and mounted on a continuation of the screw 34; the screws 34, 47 are preferably of the same pitch but of opposite thread. The screw 47 is provided with thrust bearings and engages a stationary nut 50. The pinion 45 engages a spur gear 44 on a shaft 37, which carries a differential comprising a bevelgear 53, Figs. 4 and 5, turning with the gear 44, and a bevel-gear 54 tight on the shaft. Between the bevel-gears is a centre member 55, which carries bevel pinions 56 and is of semicircular shape. The curved portion is provided with ratchet teeth 57 engaged by pivoted spring- pressed graded pawls 58 having fingers 61 engaged by a pivoted stop 62. The stop 62 is carried on a rock-shaft 63 on which the feeler 66 is provided and which also carries a finger 64 engaged by a stop on the centre member 55. The centre member engages a fixed stop 71. On the initial rotation of the shaft 37 the shafts 14, 18 are moved endways as described above, and the bevel-gear 54 is rotated, the centre member 55 turning, in the form shown, in the clockwise direction. When the sheet has been moved out of engagement with the feeler 66, the pawls 62 are released and engage the ratchet teeth 57, causing the bevel 53 and spur gear 44 to rotate in a counter-clockwise direction. The gear 44 thus rotates the pinion 45 and screw sleeve 47. Since the threads of the screws 47, 34 are opposite, the resultant motion of the nut 32 is nil and the yoke 31 remains at rest. On the return motion of the sector 39, these movements are reversed, the centre member being brought to the stop 71 and the gear 44 rotated to bring a pin 69 thereon into engagement with a fixed stop on the frame. The feeler shaft 63 is rocked by the engagement of the stop on the centre member with the finger 64, thus raising the feeler and bringing the stop 62 into engagement with the pawls 58 which are swung for engagement therewith by means of a cam surface 68 on the centre member. Fig. 8 shows a modification in which the nut 32 is rotated by a gear 73 carried by a shaft 74 having a crank 75 which is connected to the crank 43 by a telescopic spring link 76; the crank 43 is shorter than the crank 75. The gear 73 is provided with a toothed sector 78 with which the pawls 58 engage. On the rotation of the shaft 19, the yoke 31 is moved until the feeler moves off the edge of the sheet, when the pawls 58 engage the ratchet 78 and stop the endlong movement of the feed - rollers, the telescopic 'link 76 taking up the lost motion. When the crank is further rotated the spring 77 becomes extended and the crank 75 is rotated in the opposite direction; the feed-rollers are thus brought to their initial position, the pawls 58 and the feeler being reset by a stop 82 on the gear 73. These side registering-mechanisms may be combined with end registering- means in which the sheets are registered by the stops 12, to which they are fed by endless bands moving quicker than the tapes 11.